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Fronway Speedway 56 – 315/35ZRF20 106W Run-Flat

Description: The Fronway Speedway 56 in 315/35ZRF20 106W Run-Flat is an extremely wide Ultra High-Performance (UHP) tyre, specifically designed for the rear axles of high-performance vehicles, particularly luxury SUVs, performance crossovers, and some exotic sports cars. This tyre size is a common fitment for the rear of vehicles like the BMW X5/X6 M models, Porsche Cayenne, and high-spec Mercedes-Benz GLE/GLS models. It is built to handle massive torque and cornering forces, delivering superior dry grip and stability, coupled with the essential safety net of run-flat mobility.

Key Features and Technical Details:

• Run-Flat Technology (RFT): The tyre features highly reinforced, self-supporting sidewalls. Should the tyre suffer a puncture and complete air loss, this robust structure prevents the tyre from collapsing, allowing the vehicle to be driven for a limited distance (typically up to 50 miles / 80 km) at a reduced speed until a service location can be reached.

• High Load Capacity: With a 106 load index, this tyre is capable of supporting a substantial maximum load of 950kg (2094 lbs) per tyre. This high load rating is critical for managing the significant weight and dynamic forces associated with large, performance-oriented SUVs and their substantial rear-axle loads.

• High-Speed Stability: Rated W (up to 168 mph / 270 km/h), the Speedway 56 is certified for demanding, high-speed applications. The ‘ZRF’ in the size code confirms a high-performance radial run-flat construction, optimized to maintain structural integrity and minimize heat build-up across the extremely wide tread surface.

• Asymmetric Tread Design: The extra-wide tread utilizes an aggressive asymmetric pattern. The broad outer shoulder features large, rigid blocks to maximize the contact patch during cornering, ensuring immense lateral grip and stability, which is vital for handling large, powerful vehicles.

• Wet Weather Performance: Despite its focus on dry performance, the tyre incorporates wide circumferential grooves and optimized siping detail to manage water dispersion. These features work to efficiently channel water away from the contact patch, enhancing resistance to hydroplaning and improving wet-weather braking.

• Wide Footprint Optimization: The tyre’s massive 315mm width is designed with an optimal contact patch shape. This uniform distribution of pressure across the tread area ensures consistent wear, maximized traction, and predictable handling response under high power.